Walter b



(No Model.)

- W. B. WRIGHT. REHEATING WELDING FURNACE.

No. 461,155. Patented Oct. 18,1891.

I ,111111 I i UNITED STATES PATENT OFFICE.

IVALTER B. \VRIGHT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE INTER- NATIONAL GAS AND FUEL COMPANY, OF SAME PLACE.

REH EATING WELDING-FU RNACE SPECIFICATION forming part of Letters Patent No. 461,155, dated October 13, 1891. Application filed January 27, 1890. Serial No. 338,225. (No model.)

' citizen of the United States, and aresident of sliding door M, held h Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Reheating \Velding-Furnaces, of which the following is a specification.

My invention relates to furnaces particularly designed for welding, and has for its object to provide convenient means for such purpose.

- My invention is illustrated in the accompan ying drawings, wherein-- Figure l is a vertical longitudinal section; Fig. 2, a plan view, with theinterior structure shown in dotted lines.

Like parts are indicated by the same letter in both the figures.

A is the base, on which the furnace is built; B, the cover; C, the heat-chamber, and D the welding-table.

E is a fluid-fuel-supply valve; F, one of the pipes leading thereto, G is the conical aperture, through which such valve discharges into the space H over the table J, which divides the space H from the space K.

L is a discharge-aperture at the end of the fire or heating space 0 and above it rests the the, ledges N N, provided with the handles 0 O, by which it may be moved laterally to more or less uncover the aperture L.

P is a passage -way leading down from the end of the welding-table, thence along below such table, and terminating in the space K.

R is a blast-nozzle connected with the pipe S, which leads from the blower T.

V V are the holes in'the side of the side wall IV of the furnace, through which the articles to be welded or trea'tedare introduced, and by means of which the pressure Within the furnace is relieved.

The structure of the device as to details could be greatly altered without departing from the spirit of my invention.

The use and operation of my invention are as follows: The blast-fan or blow er'T being in operation, a current of air, as desired, is forced through the pipe S and thence through the nozzle R, discharging through the passage-way P, space K, heat-chamber C, and aperture L into the open air, the sliding cover M being first removed. The fluid fuel is discharged in. any desired manner through pipe F and nozzle E, through the aperture G and space H, when it engages and mingles with the air supplied at the extremity of the table J, and here the combustion takes place throughout the heat-chamber C, being sustained by the oxygen of the air furnished by means of the blower or blast-fan T. It is often found in experience that the condition of the air-supply or the ingredients of the fluid-fuel supply is-such as to make it difficult, if not impossible, to secure the desired welding heat the device is in operation the plate orsliding cover M may be placed in position so as to entirely or nearly cover the aperture L, and thus a large part of the products of combustion will be forced around through the passage P and discharged thence by means of the action of the air delivered from the nozzle E into the space K. Thus the atmospheric air is not only heated, but the products of combustion themselves are reheated, and immediately the degree of heat in the furnace on the table D and in the chamber C. After or chamber C is increased suffioiently for the required Work. The pressure in the chamber C is relieved by the open apertures V V, through which also the work is introduced.

Having. thus described my invention, What I claim, and desire to secure by Letters Patent, is as follows: I

In a furnace, the combination of the heating-chamber having the openings V in the Walls thereof, an exit-passage at its rear end,

.a valve or damper closing such exit-passage, 

